A long time ago, I remember reading a book about some kind of fantasy world, with a war. The main characters were a couple of children and their mother, and they had some kind of special power that involved weaving some kind of clothing.
I also distinctly remember them having some kind of wooden statues of gods in their home, and at some point I believe it was revealed that they themselves were offspring of those gods.
I read the book in english about 10 years ago, but it already seemed pretty old by then. The main bad guy had a relatively weird name. There was also some kind of pretty important river, as far as I can remember.